Adds the trainers themselves, dialogue still needs to be written but PvK can help with that
Currently they either don't see you or challenge you multiple times...probably issues with where the event constants are located, will sort out once I figure out the problem
* Update sign to bg_event #289
* Rename warp to warp_event
* Replace object to object_event
* Move warp macro parameter from warp x, y, id, map to warp_event x, y, map, id